JP2020141992A - Detention type medical apparatus - Google Patents

Abstract

To provide a detention type medical apparatus including a body to which a connector can be connected and effectively fastened with sufficient connection strength of the connector.SOLUTION: A liquid medicine injection port to be detained in a human body and connected to a catheter is constituted by: a base inside which at least part of a liquid reservoir is formed; a lid body for holding a diaphragm part together with the base; and a connector part 40 including an insertion part 42 to be inserted into the inside of the base or the inside of the base and the inside of the lid body and a connection part 41 outside the base to be connected to the catheter. On the insertion part 42's outer peripheral surface are provided: a plurality of inclined projection parts 42a inclined upward from the inner side of the base toward the outer side; and a flat straight part 42b between the plurality of inclined projection parts 42a.SELECTED DRAWING: Figure 5

Description

The present invention relates to an indwelling medical device.

Currently, there are indwelling medical devices that are placed inside the human body on a monthly to yearly basis. One such indwelling medical device is a drug solution injection port used for administration of an anticancer drug or the like. The drug solution injection port is used by being embedded under the skin, and a partition wall (septum) made of highly airtight compressed silicone rubber or the like is provided in the central portion thereof, and a puncture needle dedicated to this septum is provided. You can puncture and inject the drug solution. The injected drug solution is administered intravascularly through a catheter embedded under the skin together with the drug solution injection port.
As an example of this type of chemical injection port, the following Patent Document 1 is exemplified.

The implantable access port described in Patent Document 1 has a cap, a base, and a septum, which collectively define the lumen of the outlet stem and the fluid communication cavity.

Special Table 2015-526198

By the way, in the implantable access port described in Patent Document 1, a connector connected to a catheter is inserted into a resin main body to form an outlet stem (FIG. 1). However, the cap and base are made of resin, and sufficient connection strength may not be obtained simply by embedding a metal connector in the resin cap and base.
The present invention has been made in view of these points, and provides an indwelling medical device capable of connecting a connector to a main body and effectively fixing the two to obtain a sufficient connection strength of the connector. The purpose is.

The indwelling medical device of the present invention is an indwelling medical device that is indwelled in the body and connected to a catheter, and holds a base in which at least a part of a storage space is formed inside and a plug together with the base. It has a lid, an insertion portion to be inserted inside the base or the base and the inside of the lid, and a connector portion outside the base and having a connection portion connected to the catheter. However, the insertion portion has a plurality of inclined protrusions that incline upward from the inside to the outside of the base on the outer peripheral surface, and a flat straight portion between the plurality of inclined protrusions.

The present invention can provide an indwelling medical device in which a connector is connected to a main body and both are effectively fixed to obtain a sufficient connection strength of the connector.

It is a perspective view for demonstrating the indwelling type medical device of one Embodiment of this invention. It is a right side view of the chemical solution injection port shown in FIG. 1 as viewed in the x direction shown in FIG. It is a top view of the chemical injection port as seen in the −z direction shown in FIG. It is a cross-sectional view of the chemical solution injection port seen along the alternate long and short dash line shown in FIG. 2 in the direction of arrow IV-IV. It is a cross-sectional view which looked at the cross section along the alternate long and short dash line shown in FIG. 3 of the chemical solution injection port in the direction of arrow VV. (A) is a side view of the connector portion, and FIG. 6 (b) is an enlarged view of a part of FIG. 6 (a) for explaining the insertion portion. FIG. 6 is an enlarged view showing an insertion portion shown in FIG. 6A. It is a figure which shows the other structural example of the chemical solution injection port shown in FIG.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In all drawings, similar components are designated by the same reference numerals, and duplicate description will be omitted as appropriate. Further, the present embodiment shows a specific example of the technical idea of the invention, and the drawings do not limit the specific configuration, shape, size, aspect ratio, etc. of the indwelling medical device of the present embodiment.
FIG. 1 is a perspective view for explaining the indwelling medical device of the present embodiment. In the present embodiment, for example, the drug solution injection port 1 will be described as an example of an indwelling medical device. The indwelling medical device is not limited to the drug solution injection port 1, and is particularly preferably used for a device that functions by being indwelled in the body of the subject for several months to a year, but is limited to this. It's not something. Examples of medical devices other than the drug solution injection port 1 exemplified by this embodiment include an indwelling catheter and the like.

FIG. 2 is a right side view of the chemical injection port 1 as viewed in the x direction of the x, y, and z coordinates shown in FIG. FIG. 3 is a top view of the chemical solution injection port 1 shown in FIG. 1 as viewed in the −z direction of the x, y, z coordinates shown in FIG. FIG. 4 is a cross-sectional view of the chemical solution injection port 1 along the alternate long and short dash line shown in FIG. 2 as viewed in the direction of the arrow lines IV-IV. FIG. 5 is a vertical cross-sectional view of the chemical solution injection port 1 along the alternate long and short dash line shown in FIG. 3 in the direction of the arrow VV.
In the present embodiment, in the main body 100, the side of the diaphragm portion 20 shown in FIGS. 1 to 3 is referred to as “upper”, and the side of the lower surface 21 is referred to as “lower”. Further, the direction from the lower surface 21 toward the diaphragm portion 20 is described as "upper", and conversely, the direction from the diaphragm portion 20 toward the lower surface 21 is described as "downward". In addition, the vertical direction is also referred to as "vertical", and the direction orthogonal to the vertical direction is also referred to as "horizontal".

As shown in FIGS. 1 to 5, the chemical injection port 1 includes a main body 100. The main body 100 is a member embedded in the body of the subject and is a portion excluding the catheter 25 which is appropriately connected to a blood vessel. As shown in FIGS. 1 to 5, the lid body 12, the diaphragm portion 20, and the lock top 32 can be visually recognized from the appearance of the main body 100. The lid 12 is a member that constitutes the inclusion portion 10 together with the base portion 16, and the diaphragm portion 20 is compressed and pushed into the inclusion portion 10. A plurality of convex portions 20a are formed on the upper surface of the diaphragm portion 20.
The drug solution is injected into the diaphragm portion 20 by a puncture needle (not shown). The lock top 32 is a member that protects the connection portion between the connector portion 40 (FIG. 5) of the main body 100 and the catheter.

The drug solution injection port 1 of the present embodiment is an indwelling medical device indwelled in the body. The drug solution injection port 1 includes a base portion 16 that includes at least a part of the storage space, and a lid 12 that covers the storage space together with the base portion 16. The base portion 16 and the lid body 12 constitute a main body 100. Further, the main body 100 of the chemical solution injection port 1 has an insertion portion 42 inserted inside the base portion 16 and a connector portion 40 having a connection portion 41 outside the base portion 16 and connected to the catheter 25. Have. The insertion portion 42 is configured to have a plurality of inclined protrusions that incline upward from the inside to the outside of the base 16 on the outer peripheral surface, and a flat straight portion between the plurality of inclined protrusions. (Fig. 6 (a), Fig. 6 (b)). An insertion hole 45 into which the connector portion 40 is inserted is formed in the base portion 16.

The chemical solution injection port 1 is not limited to the insertion portion 42 being inserted into the base portion 16, but may be inserted into the base portion 16 and the lid body 12. The insertion position of the insertion portion 42 differs depending on the state of engagement between the base portion 16 and the lid body 12.
The drug solution injection port 1 further has a fastening member 200 for anchoring the catheter 25 (FIG. 1) to the main body 100. The fastening member 200 includes a first cover member 80 connected to a flow path hole 36 for allowing a chemical solution to flow out in the main body 100, and a second cover member 90 that fits with the first cover member 80. ..

The above configuration will be described below.
[Main body]
The main body 100 has a substantially disk-like shape having a thickness (length in the direction along the z-axis) as a whole, and the diameter of the main body 100 is about 1/2 of the maximum thickness. It becomes the maximum at the position p1 (FIGS. 1 and 2). Further, the diameter of the main body 100 gradually increases from the lower surface 21 toward the position p1, and gradually decreases from the position p1 toward the diaphragm portion 20. The main body 100 is formed with thread hook portions 23a and 23b and a marking portion 22. Each of the thread hooking portions 23a and 23b is a portion on which a thread for sewing the chemical solution injection port 1 into the body is hung.
In the present embodiment, the main body 100 is made of silicone, which is highly compatible with the living body, or polyurethane coated with a heparinized hydrophilic material. All of these materials are resin materials and have high X-ray transmittance. Therefore, in the X-ray photograph, the main body 100 becomes a translucent or white image.

The main body 100 has an inclusion portion 10 including a base portion 16 and a lid body 12. The base 16 has an opening 59, and the lid 12 closes at least a portion of the opening 59. Further, the drug solution injection port 1 is a lock top that protects the diaphragm portion 20 that is press-fitted into the lid body 12 and the base 16 and the catheter 25 (FIG. 1) that injects the drug solution injected through the diaphragm portion 20 into the blood vessel. It has 32 and. The outer diameter of the catheter 25 coincides with the inner diameter of the first hole 116a formed in the fitting convex portion 116. The diaphragm portion 20 is formed by an elastic body pushed into the opening 59 and covers the opening 59.

As shown in FIGS. 4 and 5, the base portion 16 is overlapped with the lid body 12 to form the inclusion portion 10. The base portion 16 and the lid body 12 may be integrated by heat fusion or the like. The base portion 16 has a substantially tubular tubular body 161 and an overhanging portion 162 that projects outward from the tubular body 161. The liquid reservoir 50 described above is formed inside the tubular body 161. The tubular body 161 and the liquid reservoir 50 are made of a single material. Therefore, the bottom surface 52 of the liquid reservoir 50 is made of a resin material. By forming the liquid reservoir 50 in this way, the risk that the puncture needle (not shown) for injecting the drug solution collides with the inner wall of the liquid reservoir 50 and is damaged is reduced. Further, the risk that the damaged puncture needle is pulled out from the diaphragm portion 20 and the diaphragm portion 20 is damaged is also reduced.

In the present embodiment, the liquid reservoir 50 is made of one material with the base 16, but it may be an individual member. At this time, the liquid reservoir 50 may be made of a resin material or may be made of another material.

[Connector part]
The connector portion 40 is a member for connecting the catheter 25 to the main body 100. In the present embodiment, by inserting the catheter 25 into the first hole portion 116a and inserting the connector portion 40, the catheter 25 is inserted between the inner wall of the first hole portion 116a and the outer circumference of the connector portion 40, and the connector portion 40 is fixed inside the first hole 116a. A flow path hole 36 is formed inside the connector portion 40, and the chemical solution stored in the liquid storage portion 50 flows into the catheter 25 through the flow path hole 36 and flows out into the body.
The connector portion 40 of the present embodiment is made of a metal having a high affinity with a living body. Examples of such a metal material include Co—Cr alloy, stainless steel, Ti and the like.

6 (a) and 6 (b) are views for explaining the connector portion 40 shown in FIG. 6 (a) is a side view of the connector portion 40, and FIG. 6 (b) is an enlarged view of a part of FIG. 6 (a) for explaining the insertion portion 42. As shown in FIG. 6A, the connector portion 40 includes a connecting portion 41 and an inserting portion 42. Of the connector portions 40, the connecting portion 41 is a portion in which a part thereof enters the inside of the catheter 25. The connector portion 40 may be press-fitted into the inside of the base portion 16, or may be molded together with the base portion 16 by molding. The insertion portion 42 is a portion inside the main body 100 in the connector portion 40.

As shown in FIG. 6A, the connecting portion 41 has a tip portion 41a and an intermediate portion 41b, and the catheter 25 is prevented from coming off due to the tip portion 41a having a barb shape. The intermediate portion 41b is a straight pipe having a constant outer diameter and inner diameter. The inner diameter of the intermediate portion 41b is determined according to the flow rate and outflow rate of the chemical solution. The rear end portion 41c is a portion that connects the intermediate portion 41b and the insertion portion 42, and has a portion whose outer diameter is inclined with a constant inclination.

As described above, the insertion portion 42 has a plurality of inclined protrusions 42a and a straight portion 42b between the plurality of inclined protrusions 42a. The inclined protrusion 42a has a shape that is inclined upward from the inside to the outside of the base 16 on the outer peripheral surface. More specifically, as shown in FIG. 6B, the inclined protrusion 42a has an upright surface 42aa that rises vertically from the outer peripheral surface of the insertion portion 42 and a straight portion 42b from the apex of the upright surface 42aa. It has a saw shape having an inclined surface 42ab that faces vertically. That is, the inclined protrusion 42a is inclined only in one direction from the inside to the outside of the base 16. When a force acting in the direction away from the base 16 acts on the connector portion 40, the inclined protrusion 42a is difficult to come off against the force, and when the connector portion 40 is press-fitted into the base portion 16, press-fitting is performed. It can be unobstructed.

Further, the inclined protrusion portion is formed on the outer peripheral circle of the insertion portion 42. The outer circumference circle of the present embodiment is the outer circumference of the cross section orthogonal to the central axis (not shown) of the insertion portion 42. With such a configuration, in the present embodiment, when a force in the direction away from the base portion 16 is applied to the connector portion 40 in the axial direction of the insertion portion 42, the area of the upright surface 42aa in this direction is maximized and the connector is connected. The portion 40 can be made difficult to come off from the base 16.
However, the present embodiment is not limited to such a configuration, and the inclined protrusion 42a may be formed on an outer peripheral circle that diagonally intersects the central axis of the insertion portion 42. For example, the present implementation is performed by forming the inclined protrusion 42a on the outer peripheral surface of the insertion portion 42 in the direction of the ridge of the screw and forming a screw groove that engages with the ridge on the inner surface of the insertion hole of the connector portion 40. In the form, the connector portion 40 can be easily attached to the base portion 16 and the connector portion 40 can be prevented from falling off.

FIG. 7 is a diagram showing a state of the insertion portion 42 in the insertion hole 45, and shows the insertion portion 42 shown in FIG. 6A in an enlarged manner. Three inclined protrusions 42a are formed in the insertion portion 42, and in FIG. 7, the three inclined protrusions 42a are individually inclined and inclined in order to distinguish each of the three inclined protrusions 42a. It is referred to as a protrusion 42a-2 and an inclined protrusion 42a-3.
In the insertion portion 42, an adhesive layer 48 is formed in the insertion hole 45 into which the connector portion 40 is inserted, at least between the straight portion 42b and the peripheral surface 45a of the insertion hole 45.

In the present embodiment, for example, an adhesive is applied to the insertion portion 42 or the insertion hole 45, the insertion portion 42 is inserted into the insertion hole 45, and the connector portion 40 is adhered and fixed to the base portion 16. When the adhesive is applied to the insertion portion 42, the adhesive flows downward on the upright surface 42aa and the inclined surface 42ab due to its fluidity, and it is difficult for the adhesive to stay on the surface. On the other hand, in the straight portion 42b, the adhesive spreads on the outer peripheral surface. In the present embodiment, as shown in FIG. 7, by providing the inclined protrusions 42a-1, 42a-2, 42a-3, the adhesive spreading on the outer peripheral surface is blocked, and the adhesive is spread on the straight portion 42b. Try to stay in place. According to such a configuration, a sufficient amount of adhesive for adhering the insertion portion 42 can be held on the outer peripheral surface of the insertion portion 42. If a sufficient amount of adhesive can be held between the straight portion 42b and the peripheral surface 45a, the insertion portion 42 is surely adhered in the insertion hole 45 to prevent the connector portion 40 from coming off, and the chemical solution injection port 1 Reliability can be increased.

Further, the inclined protrusions 42a-1, 42a-2, and 42a-3 protrude from the adhesive layer 48 and function as anchors with respect to the inner peripheral surface of the insertion hole 45. In this embodiment, the inclined protrusions 42a-1, 42a-2, and 42a-3 as well as the straight portion 42b contribute to increasing the fixing force of the connector portion 40 in the insertion hole 45.

Further, the connector portion 40 of the present embodiment further includes a flange 49 having a fillet 49a between the connecting portion 41 and the inserting portion 42. In the present embodiment, the height h1 of the fillet 49a is higher than the height h2 of the inclined protrusion 42a. The "height" referred to here is the radial height of the connector portion 40, and is the highest position of the fillet 49a or the inclined protrusion 42a extending from the outer peripheral surface of the connector portion 40 in the radial direction of the connector portion 40. Distance to.
In the present embodiment, an adhesive is applied to the insertion portion 42 and inserted into the insertion hole 45 so that the adhesive spreads in the insertion direction. At this time, in the present embodiment, by designing the height h1 to be sufficiently high, a sufficient amount of adhesive can be accumulated in the fillet 49a for adhesion. Further, since the height h2 of the inclined protrusion 42a is lower than the height h1 of the fillet 49a, the ability to store the adhesive is lower than that of the fillet 49a. Therefore, the adhesive accumulated by the fillet 49a can be distributed between the plurality of inclined protrusions 42a.

Further, as shown in FIG. 7, in the present embodiment, the lengths L1, L2, and L3 of the plurality of straight portions 42b are uniformly formed. By doing so, in this embodiment, the entire insertion portion 42 can be fixed in the insertion hole 45 with a uniform adhesive force.
However, the present embodiment is not limited to keeping the length of the straight portion 42b constant, and may be appropriately determined according to the desired distribution of the fixing strength. For example, in particular, when it is desired to increase the fixing strength near the opening of the insertion hole 45, in the present embodiment, the distance between the inclined protrusions 42a is made longer near the opening than on the inner side of the insertion hole 45, and the area where the adhesive is accumulated is formed. It may be made wider.
Further, the present embodiment is not limited to a configuration in which the height of the inclined protrusion 42a is constant, and the height of the inclined protrusion 42a may be increased in a place where the fixing strength is desired to be increased. By doing so, the amount of the adhesive accumulated by the inclined protrusion 42a is increased, and the adhesive strength is improved.

Further, as shown in FIG. 5, in the connector portion 40, at least a part of the plurality of inclined protrusion portions 42a has an insertion hole 45 opened directly below the diaphragm portion 20 which is a plug body and directly below the diaphragm portion 20. It is formed closer to the direction in which it was formed.
Hereinafter, such a configuration will be specifically described. As described above, a part of the connector portion 40 is inserted into the base portion 16 (FIG. 5), and the inserted portion is referred to as an insertion portion 42 (FIG. 6 (a)). As shown in FIG. 7, the insertion portion 42 is formed with the inclined protrusion 42a-3 from the three inclined protrusions 42a-1. Here, the side of the insertion portion 42 toward the opening of the insertion hole 45 (the side of the flange 49) is referred to as the “front” of the insertion portion 42. As shown in FIGS. 5 to 7, the inclined protrusion 42a-3 at the rearmost end of the insertion portion 42 is located directly below the diaphragm portion 20. Further, the other inclined protrusions 42a-1 and 42a-2 are formed closer to the opening side of the insertion hole 45 than directly below the diaphragm portion 20.
According to such a configuration, in the present embodiment, a part of the insertion portion 42 can be fixed to the portion of the base portion 16 where the diaphragm portion 20 is press-fitted, which has a relatively high strength, via the adhesive layer 48. Further, the adhesive can be accumulated between the insertion portion 42 inserted into the other portion of the base portion 16 and the insertion hole 45, and the insertion portion 42 can be indirectly fixed to the portion having high strength.

As described above, the chemical injection port 1 of the present embodiment has inclined protrusions 42a and straight portions 42b alternately formed in the insertion portion 42 of the connector portion 40, so that the chemical solution injection port 1 has an inner peripheral surface of the insertion hole 45. A gap is formed between the straight portion 42b and the straight portion 42b. Therefore, when the adhesive is applied to the periphery of the insertion portion 42 or the adhesive is injected into the insertion hole 45, the adhesive stays in the gap and exerts a sufficient adhesive force in the insertion hole 45. From this, in the present embodiment, the connector can be connected to the resin member and both can be effectively fixed to obtain a sufficient connection strength of the connector.

In the present embodiment, the state of engagement between the lid 12 and the base 16 is not limited to that shown in FIG. The present embodiment may penetrate the base 16 as shown in FIG. 8, for example. With this configuration, the connector portion 40 penetrates the two members of the lid body 12 and the base portion 16, so that the combined strength of the lid body 12 and the base portion 16 can be increased.

The above embodiment includes the following technical ideas.
(1) An indwelling medical device that is indwelled in the body and connected to a catheter, a base in which at least a part of a storage space is formed inside, a lid that holds a plug together with the base, and the above. It has an insertion portion that is inserted inside the base portion or inside the base portion and the lid body, and a connector portion that is outside the base portion and has a connection portion that is connected to the catheter.
The insertion portion is an indwelling medical device having a plurality of inclined protrusions that incline upward from the inside to the outside of the base on an outer peripheral surface, and a flat straight portion between the plurality of inclined protrusions. machine.
(2) The indwelling type according to (1), wherein the inclined protrusion portion has a saw shape having an upright surface that stands upright from the outer peripheral surface and an inclined surface that rises from the apex of the upright surface toward the straight portion. Medical equipment.
(3) The indwelling medical device according to (1) or (2), wherein the inclined protrusion portion is formed on an outer peripheral circle of the insertion portion.
(4) An indwelling medical device according to any one of (1) to (3), wherein the lengths of the plurality of straight portions are uniform.
(5) The base portion includes an insertion hole into which the insertion portion is inserted, and an adhesive layer is formed at least between the straight portion and the peripheral surface of the insertion hole, (1) to (4). Any one of the indwelling medical devices.
(6) The indwelling type according to (5), wherein at least a part of the plurality of inclined protrusions is formed closer to the direction in which the insertion hole is opened than directly below the plug body and directly below the plug body. Medical equipment.
(7) A flange having a fillet is further provided between the insertion portion and the connection portion, and the radial height of the connector portion of the inclined protrusion portion is lower than the radial height of the fillet (1). ) To (6), any one of the indwelling medical devices.

1 ... Chemical injection port 10 ... Inclusion part 12 ... Lid body 16 ... Base 20 ... Diaphragm part 20a ... Convex part 21 ... Bottom surface 22 ... Labeling parts 23a, 23b ... Thread hook part 25 ... Catheter 32 ... Lock top 36 ... Flow path hole 40 ... Connector part 41 ... Connection part 41a ... Tip part 41b ... Intermediate part 41c ... .. Rear end portion 42 ... Insertion portion 42a (42a-1, 42a-2, 42a-3) ... Inclined projection portion 42aa ... Standing surface 42ab ... Inclined surface 42b ... Straight portion 45 ... Insert hole 45a ... Peripheral surface 48 ... Adhesive layer 49 ... Flange 49a ... Fillet 50 ... Liquid reservoir 52 ... Bottom surface 59 ... Opening 80 ... First cover member 90 ... Second cover member 100 ... Main body 116 ... Fitting convex portion 116a ... First hole portion 161 ... Cylinder body 162 ... Overhanging portion 200 ... Tethering member

The indwelling medical device of the present invention is an indwelling medical device that is indwelled in the body and connected to a catheter, and holds a base in which at least a part of a storage space is formed inside and a plug together with the base. It has a lid, an insertion portion to be inserted inside the base or the base and the inside of the lid, and a connector portion outside the base and having a connection portion connected to the catheter. The insertion portion is formed in an annular shape on the outer periphery of the cross section orthogonal to the central axis of the insertion portion, and is formed on the outer peripheral surface by a plurality of inclined protrusions that incline upward from the inside to the outside of the base. have a a flat straight portion located between the plurality of the inclined projections, at least one of the overall plurality of said inclined projection portion is positioned immediately below the plug body, the other of the inclined protrusion the plug It is formed closer to the outside of the base than directly below the body, the base includes an insertion hole into which the insertion portion is inserted, and an adhesive layer is provided at least between the straight portion and the peripheral surface of the insertion hole. The inclined protrusions are formed so as to protrude from the adhesive layer .

Claims (7)

An indwelling medical device that is placed inside the body and connected to a catheter.
With a base where at least part of the storage space is formed inside,
A lid that holds the plug together with the base,
It has an insertion portion that is inserted inside the base portion or inside the base portion and the lid body, and a connector portion that is outside the base portion and has a connection portion that is connected to the catheter.
The insertion portion is an indwelling medical device having a plurality of inclined protrusions that incline upward from the inside to the outside of the base on an outer peripheral surface, and a flat straight portion between the plurality of inclined protrusions. machine. The indwelling type medical device according to claim 1, wherein the inclined protrusion portion has a saw shape having an upright surface that rises vertically from the outer peripheral surface and an inclined surface that extends from the apex of the upright surface toward the straight portion. machine. The indwelling medical device according to claim 1 or 2, wherein the inclined protrusion portion is formed on an outer peripheral circle of the insertion portion. The indwelling medical device according to any one of claims 1 to 3, wherein the lengths of the plurality of straight portions are uniform. Any one of claims 1 to 4, wherein the base portion includes an insertion hole into which the insertion portion is inserted, and an adhesive layer is formed at least between the straight portion and the peripheral surface of the insertion hole. Indwelling medical device described in. The indwelling medical device according to claim 5, wherein at least a part of the plurality of inclined protrusions is formed closer to the outside of the base portion than directly below the plug body and directly below the plug body. Claims 1 to 6 further include a flange having a fillet between the insertion portion and the connection portion, wherein the radial height of the connector portion of the inclined protrusion portion is lower than the radial height of the fillet. The indwelling medical device according to any one of the above.

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